Soon after laser ablation the corneal stroma bed was dyed by Dichlorotriazinylaminofluorescien (DTAF) to differentiate proliferated collagen and normal stroma tissue.

• 切削完毕后，行角膜基质床DTAF染色，通过颜色的差异来区分新生的胶原纤维和原有的角膜基质组织；